Rapid changes in pump operation can contribute to pressure transients in a piping system.
A controlled variable-speed pump can accelerate and decelerate more gradually than a simple fixed-speed ON/OFF system.
This can help reduce sudden pressure changes.
However, water hammer is a system-level hydraulic phenomenon.
Pipe layout, check valves, pump characteristics, elevation changes and flow velocity all influence it.
Therefore, VFD control should be considered as one part of an overall hydraulic design rather than a standalone solution.
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